Answer:
True.
Step-by-step explanation:
The given statement is True.
Those ecosystems that are discovered on the landmasses are known as the terrestrial ecosystems. The may be available in different forms such as tropical rain forests, grasslands and deserts. On the other hand, those ecosystems observed in the various water bodies such as rivers, lakes, wetlands and ponds etc, are known as the aquatic ecosystem. therefore, the statement, ecosystems can be observed within terrestrial ecosystems, is true.